.lt-main {
  position: relative;
  height: 100%;
  /*左侧一级导航*/
  /*一级导航对应的二级导航*/
}
.lt-main .cate-nav-first {
  float: left;
  width: 90px;
  height: 80%;
}
.lt-main .cate-nav-first li {
  width: 90px;
  height: 50px;
  line-height: 50px;
}
.lt-main .cate-nav-first li a {
  float: left;
  width: 100%;
  height: 100%;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  background-color: #fff;
  text-align: center;
  background-color: #E3E4E5;
  color: #666;
}
.lt-main .cate-nav-first li .current {
  background-color: #fff;
  border: none;
}
.lt-main .cate-nav-second {
  position: relative;
  height: 100%;
  overflow: hidden;
}
.lt-main .cate-nav-second li {
  float: left;
  width: 33.33%;
  text-align: center;
}
.lt-main .cate-nav-second li img {
  width: 70px;
}
